Steam-locomotive



(No Model.) Y v W. P. HENSZEY.

STEAM LOGOMOTIVB. -Y

Patented Mar.-3, 1896.

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ANDREW EGRMAM. PHOTO-LITHO- WSNINFTON D C UNITED STATES PATENT OFFICE.

WILLIAM P. HENSZEY, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-LOCOMOTIVE.

SPECIFICATION forming part of Letters Patent N0. 555,508, dated March 3, 1896.

Application Iiled November 15, 1895. Serial No. 569 ,086. (No model.)

' To all whom it may concern.'

Be it known that I, WILLIAM P. HENsZEY, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Steam-Locomotives, of which the follow-ing is a specification.

The object of my invention is to so construct the saddle or cylinder casting of a locomotive that the inlet-passage will be separated from the exhaust-passage, so lthat the exhaust-steam will not affect the live steam. This object I attain in the following Inanner, reference being had to the accompanying drawings, in which- Figure l is asectional view through the cylinder-casting of a locomotive on the line l l, Fig. 2; and Fig. 2 is a sectional plan view on the line 2 2, Fig. l.

In the ordinary construction of high-pressure locomotive-cylinders it has been customary to have the inlet-ports on the outside and the exhaust-port on the inside of the casting. By my invention I reverse this order and admit the steam to the valve through a passage inclosed by the exhaust-passage, which is separated from the live-steam passage by the dead-space.

A is the cylinder of the ordinary construction.

B is the valve-chest, which in the present instnce is cylindrical in form and has a bush- Ing a are the ports leading from the valvechamber to the cylinder.

a is the inlet-port surrounding the valvechamber and communicating with the inletpassage A.

A2 is the exhaust-passage communicating with ports a2 at each end of the valve-chamber. The bushing b of the valve-chamber is cut away opposite the several ports, so as to allow for the free passage of the live and eX- haust steam.

D is a piston-valve formed in two sections d d and attached to the valve-rod d. The sections are so arranged in relation to the ports of the valve-casing that when the valve is in the position shown in Fig. 2 the forward end of the cylinder will exhaust through the ports a and a2 to the passage A2, while steam Vis admitted to the opposite end of the chamber through the passage A', ports a and a at the opposite end of the cylinder.

Separating the inlet-passage A' from the exhaust-passage A2 is a dead-space E, which extends up to the portion e of the saddle, so that the exhaust-steam escaping through the passage A2 will not affect in any manner the live steam passing to the cylinder through the passage A. The dead-space may be open, as shown in Fig. l, or may be closed by a cover, as shown by dotted lines in said igure. The outer surface of the cylinder-casting is covered, so as to protect the high-pressure passage and the valve-chamber from the atmosphere.

I claim as my invention- The combination in a locomotive-cylinder, of the casting having a cylindrical valvechest, a central inlet-port for live steam, eX- haust-ports at each end of the valve-chest and ports leading to the cylinder midway between the inlet-port and exhaust-ports, a central inlet-passage formed in said casting and eX- tending from the said inlet-port, a dead-space at the back of the inlet-passage formed in said casting and an exhaust-passage communicating with the exhaust-ports and situated back of the dead-space so that the steam-inlet passage is separated from the exhaust-passage, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WM. P. HENSZEY.

Witnesses:

JAMES G. KEYS, JAS. H. M. HAYES. 

